Metal-cutting machine.



No. 861,122. y K PATVENTBD JULY 23, 1907;

- H. JOHN.

METAL CUTTING MACHINE.

APPLICATION FILED FEB. 14, 1907.

2 SHBETS SHEET 1.

1": mamas PETERS ca-, wasumcnm. n c.

. No. 861,122. PATENTED JULY 23, 1907.

I H. JOHN.

METAL CUTTING MACHINE.

APPLICATION FILED FEB.14, 1907.

2 SHEETS-SHEET 2.

- v I ijl yRgJII/IIWIIIIIII I/II IIIIIIIIIIIIIIII 5L1 ll m 3 1n: NORRISPETERS co was HUeo JOHN, or ERFURT, GERMANY.

METAL-CUTTING MACHINE Specification of Letters Patent.

Patented July 23', 1907.

Application filed February 14,1907. $eria1No. 357,379.

tional iron of all kinds by stamping out and shearing out i a strip fromthe work and especially to a machine of the class intended chiefly forrolled sectional iron, double T-girders and rails, 15-, Z- and angleiron.

In complex forms of iron such as double '1 girders, 3

U-, 2- iron and rails, the cutting is effected in two operations, one onthe right and the other on the left, 1 in simple forms of iron such asT-girders and angle irons the cutting is complete in one operation.

The working of the machine is such that in cutting complex forms ofiron, the upper cutter cuts at one time in the one, and at another timein the other direc- 7 tion, this result being obtained by the uppercutter being mounted on a balance beam which can be mounted in the frameeither on the left or on the right hand side relatively to the uppercutter, and is alternately rotatable about pivots one on the left, andone on the right hand side. A special feature of the machine accordingto the present invention is further the use of a bottom cutter holderwhich is turned through an angle of 180. This bottom cutter holder withits cutters is set in such manner that it rests, up to the inner flangeof the girder to be cut, at least on one half of the girder web. Thisbottom cutter holder, rotatable to ,the extent of 180, su ports, duringcutting, first one,

and then the other side of the double T-girder to be cut. In this way,it is rendered possible to avoid turning over or shifting longitudinallyof the girder during cutting. It is placed between two pairs of lateralcutters, resting laterally against the flanges, and on the bottom cutterholder which is turned under the girder to an angle of 180. Theconstructionof the machine is at the same time such that the withdrawalof the inoperative pivot pin, and the introduction of the operative onefor the balance beam supporting the upper cutter, are effectedsimultaneously so that at all times only one bolt serves and operates asthe pivot pin for the upper-cutter-balance-beam. Moreover the rotationof the bottom cutter holder can be made dependent on the introductionand withdrawal of the pivot pin of the upper-cutter-balance-beam in suchmanner that the upper cutter can out only in the direction in which thegirder is supported by the bottom.

cutter holder.

The two pairs of lateral cutters are simultaneously pressed in a uniformmanner against the flanges of the double T-girder to be cut. The lateralcutter holders are arranged on paths or guides inclined towards theworking opening, in order to enable the upper cutter to cut freely evengirders of small cross-sections.

The driving gear for the machine is provided with such devices that itcan be thrown in only when one of the pivot pins of theupper-cutter-balance-beam is in the operative, and the other in theinoperative position, and when also the upper cutter holder is in one orthe other of its end positions. The balance beam for the upper cutter isbalanced, so that the axis of the pivot pin to be introduced shouldalways coincide with the perforation in the balance beam. Finally themachine is provided with a stripping off device which, after the firstcut (before the throwing into gear of the machine for the second cut),effects the stripping off of the Work and which also protects the uppercutter from damage during the introduction of the work.

A machine embodying the invention is shown in the accompanying drawings,of which,

Figure 1 shows the machine in side elevation, and Fig. 2 in frontelevation, Fig. 3 is a horizontal cross-section above the bottom cutterholder, Fig.4 is a horizontal cross-section in the direction of thelevel of the pivot pins on the line A B of Fig. 1. Fig. 4 shows the lefthand pin thrown into gear, and therefore the bottom cutter holderoperative on the left hand side. Figs. 5-8 illustrate the working of themachine during cutting in one or in the other direction, Fig. 5 showingthe position of the upper cutter holder before the beginning of the lefthand out, Fig. 6 the position of the upper cutter holder after thecompleted left hand cut, Fig. 7 the position of the upper cutter holderbefore thebeginning of the right hand cut, and Fig. 8 the position ofthe upper cutter after the completed right hand cut. Fig. 9 shows thestripping off device in front and side elevation.

The construction of the machine is as followsz-At the lower portion ofthe machine frame, made of suitable plates 1 and 2 and strengthened bytwo brackets 3 and 4, is provided the working opening. The tools consistof the rotatable bottom cutter holder 5 with the bottom cutters 6 and 7held fast to their seat by means of screws and spring bolts, of the twolateral cutters 8, and of the upper cutter 9 cutting between the lateralcutters and the bottom cutters. The bottom cutter holder is adjustablymounted on a rotatable plate 10 and is held in position by suitablemeans. The plate 10 rests on the walls of the frame and rotates aboutthe central pin 11 which is secured by a bolt, or in other suitable way,to the frame 1, 2. The bottom cutter holder 5 is set in accordance withthe dimensions of the cross-section of the sectional iron to be cut. Thediameter of the semicircle which it describes, is about equal to theinside height of the T-girder to be cut. After the cutting is completed,the bottom cutting holder is turned to an angle I 15, 15 of which eachhas a pair 8 of lateral cutters.

of 180 before the second cutting is made. In order to bring about theturning of the bottom cutter holder, the plate 10 is provided at thebottom end with a worm wheel 12 with which engages a worm 13 mounted ona spindle 14. The means for rotating the spindle 14 will be describedhereafter.

The lateral cutting device mounted adjustably on inclined paths orguides, comprises lateral cutter holders The two lateral cutter holders15 are guided at top and bottom in corresponding recesses of the twoframe walls 1 and 2. The bottom guide is completed by means of setpieces placed between the walls of the frame. The back surfaces of thelateral cutter holders 15 are provided with a through groove 16 withwhich engage correspondingly shaped heads of two screw spindles 17.

.These screw spindles 17 engage female threads in two pins 18 which passthrough the frame body and are secured to it. On the grooved smooth end18 of each .spindle 1 7 are mounted toothed wheels 19 which areprevented from shifting laterally by means of suitable .bearings 20.With the toothed wheels 19 engage toothed wheels 21. The connectionbetween the two systems dle 23, the screw spindles 17 are movedrelatively to .each other, and the lateral cutter holders 15 at the sametime brought simultaneously nearer together or further apart, inaccordance with the height of the cross-section to be cut.

The upper cutter 9 is the only power-driven cutting part of the machine,and serves for cutting out a strip from the work, for instance, from thedouble T-girder shown in the drawing. The upper cutter 9 is mounted onthe adjustable upper cutter holder 24. An upper portion 9 of the uppercutter 9 is embedded in the up per cutter holder in such manner that thecutting edge projects downwards. The upper cutter holder 24 has theshape of a balance beam, it is reduced towards the two ends and providedwith a perforation at each end for receiving a pivot pin 25 or 26.

, During the cutting of the upper cutter in one direction the uppercutter holder must be rotatable about one pivot pin, say 25, and duringcutting in the other direction, about the other pivot pin 26. The uppercutter holder must, therefore, make an oscillating movement about onepivot pin, and during that time the other pivot pin must be removed,that is to say, withdrawn from its opening. This is done by means of thefollowing arrangement The two pivot pins 25 and 26 are connected by adouble lever 27, of which the pivot point or fulcrum 28 is supported ina bearing 29, and its end 27 engages with slots 25 or 26 of the pins 25and 26. Owing to this arrangement the pivot pins move in opposite direc--tions On the fly wheel spindle 30 is mounted a pulley 31which, by meansof a belt 32, drives a pulley 33 of a reversing gear. This gear consistsof disks 34 35 keyed to the spindle 14, and of the friction disk 36driven by the pulley 33. The spindle 14 is adjustableinthe longitudinaldirection. It is shifted by-a needle: 37

provided with a step for the right and left foot and en gaging thespindle 14 by means of a short lever 38 and a clutch. On the spindle 1.4is also rotatably mounted a worm 39 engaging with a worm wheel segment40 keyed to the spindle 41. The spindle 41 is provided at its upper endwith a toothed segment 42 engaging with the teeth 43 of the flat toothedside of the pivot pin 25. The method of driving the fly wheel spindle 30and the reversing gear 34 35 36, as well as the direction of movement ofthe worm wheel gear 39 40 is selected in such manner that, on depressingthe left treadle 37, the left hand pivot pin 25 is introduced, and formsa pivot pin for the upper cutter holder 24, while the right hand pin 26is withdrawrffrom the upper cutter holder 24 by means of the doublelever 27. On the spindle 14 is also mounted a worm 13 engaging with theworm Wheel 12 of the bottom cutter holder 5. The direction of movementof this worm wheel gear is such that, when the left treadle 37 isdepressed, and consequently the left hand pin 25 put in, the bottomcutter holder 5 is brought into its left hand position. On the righttreadle being depressed, the right hand pin 26 becomes the pivot pin forthe upper cutter holder 24, and the bottom cutter holder 25 is broughtby the worm wheel gear 12 13 into its right hand position.

In order to bring about automatic return of the upper cutter holder 24into its upper position, the upper cutter holder 24 is suspended at bothends by means of a chain 44 to a roller 45 rotatably mounted on theshorter lever end 46 of a double lever 46 47 rotatable about the pin 48of a bearing 49 secured to the frame. To the longer end 47 of the doublelever 46 47 is suspended a weight 50 which is so heavy that the uppercutter holder is more than balanced, taking into consideration the ratioof the lever arms. Owing to the suspension of the upper cutter .holder24 at both its ends by means of the chain 44 to the roller 45 mountedabove the cen ter of the upper cutter holder 24, the upper cutter holdercan swing without disturbing the working of the balancing device. As,moreover, the ratio of the levers 46 47 is utilized for the purposes ofbalancing, and only one half of the upper cutter holder has to bebalanced at a time, since the other half rotates about the pivot pin 26,it is necessary to have only a comparatively small weight 50, namelyhalf of the upper cutter holder weight resulting from the ratio betweenthe levers 46 47 for the purpose of balancing the upper cutter holder24.

p In order that the upper cutter holder, on its return into the upperend position, should again find the proper position, the pins 25 26 aremade so that they cannot be withdrawn completely, but the portionof thematerial of the upper cutter holder 24, situated over the short end ofthe bolt 25 remaining in the upper cutter holder, is made into a channelor recess 51. In this way, the path of the upper cutter holder whichreceives itsworking pressure and its downward movement over the uppercutter, is free downwards when the pin is withdrawn, and the correctnessof the upper end position is therefore always insured. The pins 25 26are guided and supported each in a socket 52, and in av bearing ring 53secured in a. suitable manner to the walls of the frame.

- The machine is driven from the fly wheel spindle 30 by means of acountershaft with eccentric 54. The.

upper cutter holder 24 is operated by a beam '55. To that end, the flywheel spindle 30 on which are mounted the driving pulley 56, and theloose pulley 57 as well as the fly wheel 58, is provided with a toothedwheel 59 engaging with the toothed wheel 60 of the intermediate spindle61. The spindle 61 is provided with a toothed wheel 62 engaging with thelarge toothed wheel 63 on the eccentric spindle 64. The arrangementissuch that a clutch is used which by pulling the handle 65 is throwninto engagement with a rod 66 by means of the lever 67, and rotates theeccentric spindle 64, while on the contrary, after a completerevolutionof the eccentric 54, that is to say after half a cut has 26fully introduced, so that the end of the rod 66 can been effected thecoupling is automatically thrown out of gear. known and do not form thesubject of this invention.

In order to enable the coupling to take place, that is to say, theeccentric thrown into gear, only when the pins 25 and 26 and the bottomcutter holder 5 are in the position ready for cutting, and in order toprevent the throwing into gear when the said pins are, for instance,only in the central position, the pivot pin 26 is provided at itscircumference with two recesses 68 69 i rails is the same as abovedescribed. The cutting of ,1 T- and angle-irons is effected only at oneside, as they 5 can be cut in one operation. For cutting smaller I- U- Iand Z- irons and rails, a smaller upper cutter, and a (Fig. 4) withwhich the end 66 of the rod 66' can engage. It follows therefrom thatthe rod 66 can be pulled down, for the purpose of throwing the clutchinto gear and making the eccentric 54 operative only when the pin 26 isin one of its end positions. In the intermediate position, the bottomend 66 of the rod 66 strikes against the solid body of the pin 26 andprevents the coupling from being effected.

For the double purpose, first of keeping the work,

already partly cut during the first operation, in its po-.

sition during the upward movement of the upper cutter, and, secondly ofprotecting the upper cutter from damage or breakage during theintroduction of the bars to be cut, there is provided a stripping offdevice 70 (Figs. 1 and 9). This stripping off device 70 is bent to hookshape at its bottom end 70, for the purpose of deflecting the work movedtowards the working opening, but perhaps held too high, and of guidingit between the cutters. The stripping-off device is pivoted by means ofa pin 71 to a stripping-off bearing 72 screwed to the frame wall, sothat it can be tipped over upwards when it is desired to render theworking opening free for instance, when changing the work, or when thesaid stripping off device is not to be used, for instance, when cuttingsuch kinds of iron bars which can be cut in one operation. The strippingoff device cannot be forced from its bottom position towards the uppercutter, as it finds a stop surface 72 in the stripping off bearing 72.

The working of the machine is as follows:Assuming that it is desired tocut a double T-girder and that the parts of themachine are in theposition shown in Fig. 1, the bottom cutter holder 5 is set and securedto suit the inside height of the cross-section of the work. Then thegirder to be cut is introduced into the working opening, and the lateralcutters 6 brought against the flanges by turning the handle. Then theclutch is thrown in by means of the handle 65, whereupon the left cut iseffected at once in the direction of the ar row, Figs. 5 and 6, and upto the point of the same, and the upper cutter returns in the same wayinto its upper end position Fig. 5, in order to be stopped by 1 14 isrotated in the opposite direction. 1 wheels 42 43 on the spindle 41, thepivot pin 25 is Such couplings on machine tools are well 7 can be thrownin. i to the engagement of the worm 13 with the worm wheel 1 12, thebottom cutter holder 5 has been turned to an the throwing out of gear ofthe clutch. This cut has been effected by the operation of the leftpedal 37, whereby the disk 35 came into connection with the frictionwheel 36 driven from the fly wheel spindle, and the spindle 41 is movedby the worm gears 39 40 to actuate the toothed gear 42 43 of the pin 25,so that the latter formed the pivot for the upper cutter holder 24. If,after the left out has been effected, theright hand pedal 37 isdepressed, the pulley 34 comes into engagement with the friction disk36. The spindle Owing to the withdrawn from the upper cutter holder, andthe pin engage with the recess 68 of the pin and thus the clutch At thesame time, however owing angle of 180 whereupon the right hand out takesfrom the position shown in Fig. 7, into that shown in a Fig. 8,whereupon it returns to its original position.

The process for cutting any I- U- and Z-girders and shorter bottomcutter holder, are put in. In order to enable small girders to be cutwith the same lateral able the cutting to be effected without anyobstacle 1 and the lateral cutter holders not to be in the way of ,theupper cutter.

It frequently happens that it is necessary to repeat like cuts for thesame cross-section, then it is advantageous'to use special bottom cutterholders which support the cross-sections in question throughout thewhole of their width, so that it is not necessary to turn the bottomcutter holder but merely to shift the pivot pins 25 26 for the purposeof effecting a right and a left cut. To that end, the bearing 73 for theworm 13 is made detachable from, and adjustable on, the spindle 14, sothat, after disconnecting the bearing 73 during the rotation of thereversing gear 34,

35, 36, the worm 13 moves loosely on the spindle 14 on which it issecured by means of key and groove, with out the bottom cutter holderbeing rotated. Then the pins 25 26 are alternately introduced orwithdrawn by means of the reversing gear 34 35 36.

What I claim is:

1. A machine of the class described involving a cutting element movableinto working position, alternating pivotal connections for the cuttingelement, means for releasing one of the pivotal connections, while theother connection is in pivotal engagement with the element, and flexibleweight controlled means for automatically moving the cutting elementinto position for receiving its alternately pivotal connections,

2. A machine of the class described involving a movable cutting element,laterally movable shearing devices 00- operative therewith, means forbringing the cutting element into Working position, alternating pivotalconnections for the cutting element, mechanism for disconnecting one ofthe pivotal members while the other pivotal member has connection withthe cutting element, and a weight controlled suspending device for thecutting ele ment to allow the relative movement thereof and to bring thesame to an inoperative position.

In a machine of the class described, a movable cut ting element, andcooperative shearing devices, a rotatable movable bottom work supportingelement, alternating pivotal connections for the movable cutting elementto form the axis of movement thereof, means for withdrawing one of thepivotal connections and for introducing the other pivotal connection inposition in the cutting element for the axis of movement thereof, guidedevices coiiperative with the pivotal connection and the cutting elementto position the latter for receiving pivotal connection, a fulcrumlever, a pulley mounted at one end of the lever, a weight connected tothe opposite end of said lever, flexible means passing over thepulley'and connected near opposite ends of the cutting element to allowswinging movement thereof and to automatically return the same to normalinoperative position, mechanism for operating the cutting element, andcooperative means for setting the shearing devices.

4. In a machine of the class described, a movable cutting member, aplurality of pivotal connections for the cutting member, means forwithdrawing one of the pivotal connections from engagement With thecutting member when the remaining pivotal connection is in operativeposition to allow said cutting member to move in opposite directions,means for locking the pivotal connections in a fixed position,adjustable shearing devices, means for moving the shearing devicestowards and away from each other, a rcvoluble adjustable work supportingplate, and flexible weight controlled means for suspending the cuttingelement to allow swinging movement of the latter on its pivotal axis andalso for returning the same to normal position.

5. In a machine of the class described, a movable cutter head, a cutterassociated with said cutter head, alternately movable pivotal pins forengagement with the cutter head to change the axis of movement of thecutter, a pivotal lever for connecting said pins, a rotatable shafthaving a toothed in engagement with one of the pins, adjustable shearingdevices for the cutters, a revoluble adjustable work supporting element,clutch, reversing gear mech-.

anism coliperativewith said work supporting element and the said rotaryshaft, pressure levers for actuating the clutch reversing gear to changethe pivotal connection of the cutter head and also to change theposition of the work supporting element, means for actuating the cutterhead to bring the cutter into working position, and independentmechanism for simultaneously moving the shearing devices towards andaway from each other. v

6. In a machine of the class described, a movable cutter head, a cutterassociated with said cutter head, alternately movable pivotal pins forengagement with the cutter head to change the axis of movement of thecutter, a pivotal lever for connecting said pins, a rotatable shafthaving a toothed gear in engagement with one of the pins, adjustableshearing devices for the cutters, a revoluble adjustable work supportingelement, clutch reversing gear mechanism cooperative with said worksupporting element and the said rotary shaft, pressure lcversforactuating the clutch reversing gear to change the pivotal connection ofthe cutter head and also to change the position of the work supportingelement, means for actuating the cutter head to bring the cutter intoworking position, independent mechanism for simultaneously moving theshearing devices towards and away from each other, anda weightcontrolled flexible connection associated with the cutter head to allowthe swinging of the same in its direction of movement and also to returnsaid head to normal position.

7. In a machine of the class described, a movable cutting member havingalternately pivotal axes to allow said member to move in differentdirections, shiftable shearing devices, mechanism for operatingthecutting member, independent mechanism for actuating the shearingdevices, and a weight controlled suspending device for the cuttingmember to allow the latter to swing upon its axes and also to return thesame to normal position.

8. In a machine of the class described, a movable cutting member, thelatter movable upon a plurality of pivotal axes, means for alternatelyreleasing the axes, and a weight controlled suspending means cooperativewith the cutting member to allow the swinging of the same on therespective axes and also for returning the same. to normal position.

9. In a machine of the class described, a movable cutting element, thelatter having different axis of movement, mechanism for alternatelychanging the axes of movement of the cutting element, means for lockingsaid mechanism against movement, and a weight controlled suspendingdevice associated with the cutting element to allow swinging movement ofthe latter upon its axes and for returning the same to normal position.

10. In a machine of the class described, a movable cutting element, thelatter having diflferent axis of movement, mechanism for alternatelychanging the axes of movement of the cutting element, means for lockingsaid mechanism against movement, a flexible weight controlled suspendingdevice associated with the cutting element to allow swinging movement ofthe latter upon its axes and for returning the same to normal position,and mechanism for actuating the cutting element to bring the same intoworking position.

11. In a machine of the class described, a movable cutting elementhaving a plurality of axes of movement, mechanism for alternatelychanging the axis of movement, and tlcxible weight controlled suspendingmeans associated with the cutting element to allow swinging movementthereof and also to return the same to normal position.

12. In a machine of the class described, a movable cutting element,alternating pivotal connections for the said element, mechanism foractuating the pivotal connections to change the axis of movement of thecuttingelement, means for moving the cutting element into operativeposition, cooperative means for locking the pivotal connections againstmovement, and a weight controlled flexible connection with the cuttingelement to allow the swinging movement of the latter upon its axes andfor automatically returning the same to position for alternatelychanging its pivotal connection.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

' HUGO JOHN. Witnesses PAUL TSICHMANN, EaNs'r Ennnrmnn'r.

